Corning Lasertron, Incorporated

Oclaro Inc.

Andreas Kussmaul

A laser diode pump for fiber amplifiers, such as erbium-doped fiber amplifiers (EDFAs), reduces spurious reflections in the signal frequencies by providing a laser pump system that is dissipative at these signal frequencies. Reflections from the pump system are reduced, or eliminated by using an output facet that is currently coated to be reflective at pump frequencies, but anti-reflective, or transmissive, at the signal frequencies. In one embodiment, material layers of aluminum oxide (Al,O,), titanium dioxide (TiO,), and silicon dioxide (SiO,) are used.

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Lexington, MA, United States of America

Andreas Kussmaul